Details
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Bug
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Status: Closed
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Critical
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Resolution: Information Provided
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Impala 2.6.0
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None
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None
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ghx-label-9
Description
This also repro's in latest version, but it was introduced in CDH5.8 / Impala 2.6. It happens with a large amount of OR predicates over a wide table. I've attached two profiles, the codegen part is interesting:
2.5:
CodeGen:(Total: 28s173ms, non-child: 28s173ms, % non-child: 100.00%) - CodegenTime: 507.007ms - CompileTime: 16s150ms - LoadTime: 0.000ns - ModuleBitcodeSize: 1.84 MB (1925128) - OptimizationTime: 11s791ms - PrepareTime: 202.002ms
2.6:
CodeGen:(Total: 11m36s, non-child: 11m36s, % non-child: 100.00%) - CodegenTime: 40.000ms - CompileTime: 15s580ms - LoadTime: 0.000ns - ModuleBitcodeSize: 2.19 MB (2300548) - NumFunctions: 3.51K (3514) - NumInstructions: 74.28K (74282) - OptimizationTime: 11m20s - PrepareTime: 169.000ms
Attachments
Attachments
Issue Links
- relates to
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IMPALA-5980 Upgrade to LLVM 5.0.1
- Resolved